Release Notes for the Cisco Cloud Native BNG Control Plane, Version 2025.04.0
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Release Notes for the Cisco Cloud Native BNG Control Plane, Version 2025.04.0
Release Notes for the Cisco Cloud Native BNG Control Plane, Version 2025.04.0
This Release Notes identifies changes and issues related to the software release of Cisco Cloud Native BNG Control Plane.
The key highlights of this release include:
· Seamless session continuity with geographical redundancy for L2TP
Maintain L2TP subscriber sessions without disruption during control plane failover using automatic synchronization of tunnel and session states, ensuring uninterrupted service.
· Enhanced visibility with session disconnect history improvements
Increase storage for disconnect history (up to 168,000 entries for two User Planes), clear records by User Plane, set custom limits, and monitor metrics in Grafana for better operational insight.
· Simplified setup with automated control plane flow control
Configure flow and overload controls for User Plane Functions automatically based on user-defined CPS values, reducing manual configuration and improving consistency.
· Flexible IP management with circuit-id support in static IPAM pools
Use Circuit-ID as the key for static IP address pools, enabling more granular and flexible IP assignment and simplifying configuration with direct SRG-PeerID association.
· Improved auditability with detailed IP, ID, and chunk event logging
Track the allocation, release, and movement of IPs, IDs, and resource chunks with comprehensive event logs, enhancing debuggability and audit trails.
· Seamless integration with modern data center fabrics
Easily connect cnBNG to VXLAN EVPN, Cisco ACI, and traditional vPC architectures for flexible deployment.
For more information about cnBNG Control Plane and related products, see the Related resources section.
Release lifecycle milestones
The following table provides EoL milestones for Cisco cnBNG Control Plane software:
Table 1. EoL milestone information for cnBNG CP, Release 2025.04.0
| Milestone |
Date |
| First Customer Ship (FCS) |
10-Nov-2025 |
| End of Life (EoL) |
10-Nov-2025 |
| End of Software Maintenance (EoSM) |
10-Nov-2028 |
| End of Vulnerability and Security Support (EoVSS) |
10-Nov-2029 |
| Last Date of Support (LDoS) |
10-May-2030 |
This section provides a brief description of the new software features introduced in this release.
Table 2. New software features for cnBNG CP, Release 2025.04.0
| Product impact |
Feature |
Description |
| Software Reliability
|
You can now maintain L2TP subscriber sessions without disruption during control plane failover using control plane geographical redundancy (CP-GR). When a failover occurs, the control plane automatically synchronizes critical L2TP tunnel and session state with the user plane, allowing tunnels and sessions to continue seamlessly. |
|
| Ease of Use |
You can now clear session disconnect history and increase the storage limit to 168,000 entries for up to two User Planes. New CLI commands allow clearing records by User Plane and setting custom limits. Disconnect history metrics are also available in Grafana for improved monitoring and visibility. |
|
| Ease of Setup |
You can now configure flow control and overload control for User Plane Functions (UPFs) automatically, greatly reducing manual effort and improving operational consistency. With cnBNG Release 2025.04.0, dispatcher and overload controls are set based on user-supplied CPS (Calls Per Second) values for each UPF and for the control plane cluster. |
|
| Ease of Use |
You can now use Circuit-ID as the ipam-dp-key in static IPAM pools, which increases flexibility for IP address management. With this feature, administrators can directly specify the associated SRG-PeerID in the static pool configuration. |
|
| Software Reliability
|
You can now track the allocation, release, and movement of IP addresses, IDs, and chunks for improved debuggability and auditing. The system records detailed lifecycle events, including timestamps and relevant keys, and writes them to dedicated log files at regular intervals or after a set number of events. |
|
| Hardware Reliability |
High-Availability integration of cnBNG with Data Center Fabrics |
cnBNG now offers high availability and seamless integration with modern data center fabrics. It connects Kubernetes clusters using dual-homed links and supports VXLAN EVPN, Cisco ACI, and traditional vPC architectures. This enables fast failover, efficient traffic handling, and strong security for reliable services. |
This table lists the open issues in this specific software release.
Note: This software release may contain open bugs first identified in other releases. To see additional information, click the bug ID to access the Cisco Bug Search Tool. To search for a documented Cisco product issue, type in the browser: <bug_number> site:cisco.com
Table 3. Open issues for cnBNG CP, Release 2025.04.0
| Bug ID |
Description |
| CDL UpdateFlags-404 Errors during call bringdown |
|
| CDL Update-409 errors for LAC/LNS sessions post CP-GR switchover |
This section lists compatibility information of the software components/packages that are verified to work with this version of the cnBNG Control Plane software.
Table 4. Compatibility information for cnBNG CP, Release 2025.04.0
| Product |
Supported Release |
| BNG UP (ASR 9K) |
IOS XR Release 25.4.1* |
| SMI CEE |
2025.04.1.17 |
| SMI Cluster Deployer |
2025.04.1.17 |
| SMI Base ISO Image |
24.04.0-20251112 |
*Subject to feature availability.
This section provides information about the release packages associated with cnBNG Control Plane software.
Table 5. Software packages for cnBNG CP, Release 2025.04.0
| Software Package |
Description |
Release |
| bng.2025.04.0.SPA.tgz |
The cnBNG CP offline release signature package. This package contains the cnBNG CP deployment software as well as the release signature, certificate, and verification information. |
2025.04.0 |
| ncs-6.4.8.1-cisco-bng-nc-1.1.2025.04.0 |
The NETCONF NED package. This package includes all the yang files that are used for NF configuration. Note that NSO is used for the NED file creation. |
6.4.8.1 |
| ncs-6.4.8.1-cisco-bng-smi-deployer-2025.04.0 |
NSO Core-Function-Pack |
6.4.8.1 |
Cloud native product version numbering system
The show helm list command displays detailed information about the version of the cloud native product currently deployed.
Image checksum information is available through Cisco.com Software Download Details. To find the checksum, hover the mouse pointer over the software image you have downloaded.
To validate the information, calculate a SHA512 checksum using the information in the following table and verify that it matches the one provided on the software download page.
To calculate a SHA512 checksum on your local desktop, see this table.
Table 6. Checksum calculations per operating system
| Operating System |
SHA512 checksum calculation command examples |
| Microsoft Windows |
Open a command line window and type the following command: > certutil.exe -hashfile <filename.extension> SHA512 |
| Apple MAC |
Open a terminal window and type the following command: $ shasum -a 512 <filename.extension> |
| Linux |
Open a terminal window and type the following command: $ sha512sum <filename.extension> OR $ shasum -a 512 <filename.extension> |
| Note: <filename> is the name of the file. <extension> is the file type extension (for example, .zip or .tgz). |
|
If the SHA512 checksum does not match, we advise you not to attempt upgrading any systems with the corrupted software image. Download the software again and verify the SHA512 checksum again. If there is a constant mismatch, please open a case with the Cisco Technical Assistance Center.
This table provides key resources and links to the support information and essential documentation for cnBNG Control Plane and related products.
Table 7. Related resources and additional information
| Resource |
Link |
| cnBNG Control Plane documentation |
|
| cnBNG User Plane documentation |
|
| Physical BNG documentation |
|
| SMI documentation |
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